Reaming attachment for die-stocks.



L. 1-3. WELSH. REAMING ATTACHMENT FOR DIE STOCKS.

APPLICATION FILED MAY 21, 1913 Patented May 19, 1914.

'- will be reamed simultaneously with the out LAWRENCE WELSH, orMERIDEN, connnc'rrco'r.

.REAMING ATTACHMENT FOR DIE-STOCKS.

Specification of Letters Patent.

Application filed ne 21, 1912. Serial No. 769,046.

To aZZ whom it may-concern: i

Be itlmown that LLAwnnNon E. WELGH, a citizen of the UnitedStates;residing at Meriden, in the count of New Haven and State ofConnecticu't,-. ave invented certain new and'useful Improvements inRoaming Attachments for 'Diel Stocks, of which the following is aspecification.

My invention relates to, improvements in reaming attachmcnt-s for diestocks, and the object of my improvement is to produce'an attachment fordie stocks whereby a pipe ring of the thread thereof.

1n the accompanying drawing: Figure 1 is a plan view of my improved diestock. Fig. is a side elevation of the same, and part of a pipe. Fig. 3is a lan view of the same with the reaming attac ment removed. Fig-4. isa perspective view of'the reamer strap. Fig. 5 is a side elevation ofthe rcamer. Fig. 6 is a front end view of the same on an enlarged scale.Fig. 7 1s a sec-.

tional view on the line a: of Fig. 1. Fig. 8 is a similar view of thesame with the parts in a dillerent position from that shown in Fig. 7.Fig.0 is a sectional view on the line y 3 of Fig. 1.

The die stock .proper l0 involving the thread cutting portion of itselfmaybe ordinary and comprises a body ortion 11 having laterally extendinghand cs 12 and provided with a central 0 ening 13 in which i the pipe14: is positionc andhaving on the outer 'lace a dlametral way 15interrupted by the opening, 13 in which is positioned a pair of cutterblocks 16, one on'each side of the opr-ning 13, and having on theiropposed faces thread cutting jaws 17. The cutter blocks 16 are eachpierced through the body portion by a hole 18'.tuitab1y to receive alocking screw 19. -The lower face of the way 15 is provided with athreaded hole 20 in registration with the. holel 18 and suitable forreceiving the end of the said locking screw 19. The locking screw 19 ismade longer than usual for a purpose to be described. Thedie stock 10described issuitable for cutting a thread 21011 the exterior of the pipe14: in an ordinary manner.

The pipe 14 on the end of which the thread 21. is cut to the properlength by a cutting of? tool or machine of ordinary character so thatthe end presented to the die stock 10 to have the thread cut thereon hasat the inner rim or edge the usual rough edge in the'form of a bur orswelling 22,

which if not removed obstructs and seriously interferes with the flow ofthe water through the pipe.

By means 0 my attachment the reamcr 23 operates to remove the bur 22simultaneously with. the cutting of the thread 21.. The said attachmentcomprises the reamcr 23 and a holder therefor in the form of a stra 2 Lsecured in some suitable manner to the body portion 11. I prefer tosecure to the strap 24 in the manner shown by means of the lockingscrews 19 that hold the cutter blocks 16. The said strap 2% has a bodyportion of U shape, comprising thesaid arms 25 cross-connected by theyoke 26 at the apex. The free ends of the arms 25 are provided with feet27 having holes or slots 28 suitable for admitting the locking screws19; The yoke 26 is provided with a hole 29, which as shown is squarcfandwhich in axial alinement with the pipe 14.

The feet 27 rest on the outer face of the cutter blocks iii and-thestrap or holder 24 when secured by the locking screws 1!) serves as anextension beyond thercar face of the die stock 10 and in line with thepipe 14, and in this extension thereamer 223 isoperatively housed. Thesaid manner 23 comprises a rcainer body 30 having a plurality of cutterblades 31, a neck extending rearwardly from the said body 30 andprovided at the rear end with a platform 36 from which extendsrearwardly the headilzl. The said head 33 is square, and is a lit forthe hole 29 in the strap 2d and is held therein by means of a cotterpin. 37 which passes through a hole 38 in the said head 33. The blades31 comprise each a taperedportion 3d at the front end and which mergesinto a par allel portion inwardly" therefrom. The said parallel portionis parallel with the axis and has a radius corresponding to the radiusof the bore of the pipe Ll.

Accordingly, the reainer is suitable for cutting away the portion of thebar 22 in excess of the interior diameter of the pipe and to leave thebore of the pipe flush and of full proper diameter.

I prefer to have the length of the manner 23 such that the thread cutterjaws 17 will have started the thread 21 lo the extent ol? a thread ortwo before the cuttcrs blades 31 will engage with the bur 22, as shownin Fig. 7, and will completely remove the said bur 22 before the fulllength of the thread Y Patented May 19, 1914. a

2 oeesz e Ql has been cut as shown in Fi 8 and this I ierin from theiarticular st lc shown in is permissible because the bur 22 is ofconsiglerahly lessextent than the thread .21. Men because of the(lifi'erenee mentioned hetween the extent of the thread and the bar thecutter blades 31 may he sharpened and operate in the manner described.

Vilh my attachment as described close nipples may be reamed while. thethread is being cut thereon conveniently and without injury. Alsobecause of the shape of the roamer and by having some loose play intheengagement of the head with the strap, it is possible to out what isknown as a crooked thread and at the same time roam the interior of thepipe. The loose play mentioned is obtained by having the hole in theyoke a loose fit for the head of the cutting element,

It is understood that by making minor changes in details that anyattachment as described may be used with die stocks difthe drawn'ig.

I claim as my invenlionz- 5 .f die stock and reamor combination conrprising a die stock having means for cutting a thread on the exterior ofa pipe, a reamer For reaming the interior of the said pipe, connectingmeans for connecting the said so reamer to the said die stock so as toeffect such reaming simultaneously with such cutting of the thread, thesaid reamer comprising a cutting element at oneend and a 11011- circularhead at the other end and in axial 35 alinement With the said cuttingelement, and the said connecting means comprising a yoke having a holefor receiving the said head. and that is a loose fit therefolx LAWRENCEE. \VELOH.

Wi tnesses i SHEFFIELD H. ULARKE, I ROGER W. EDWARDS.

